硼铁矿碳热氯化反应  

Carbonchlorination Reaction of Ludwigite

作　　者：王小欢[1] 张丽清[1] 侯明艳[1] 王婷[1] 周华锋[1] 

机构地区：[1]沈阳化工学院应用化学系

出　　处：《过程工程学报》2007年第4期702-705,共4页The Chinese Journal of Process Engineering

基　　金：辽宁省教育厅科学研究计划基金资助项目(编号:05L336);辽宁省高校硼资源生态化综合利用与硼材料重点实验室资助项目(编号:200602)

摘　　要：应用热力学方法分析了硼铁矿碳热氯化反应的可能性以及反应进行所需要的热力学条件,硼铁矿中各组分的氯化反应能力顺序为2MgO·B2O3>MgO>Fe2O3>Mg2SiO4>SiO2.根据氯化反应产物的物理化学性质不同,初步实现了硼铁矿中主要元素硼、镁、铁的分离.主要研究了反应温度和时间对硼铁矿碳热氯化反应的影响,实验在550～750℃进行,并得到最佳氯化条件:在700℃氯化反应进行90min,硼铁矿氯化率为94.02%.经X射线衍射分析硼铁矿中未被氯化的物质主要为Mg2SiO4.The feasibility of ludwigite carbonchlorination process and its requisite thermodynamic conditions were analyzed with thermodynamics. The compounds contained in the ludwigite, follow a thermodynamic carbonchlorination ability order of 2MgO-B203〉 MgO〉Fe2O3〉Mg2SiO4〉SiO2. According to the different physical and chemical characters of chlorination products, the separation of main elements, boron, magnesium and iron in ludwigite was realized preliminarily. In this study, the influential factors of reaction temperature and time on ludwigite chlorination rate were examined. Ludwigite carbonchlorination process was investigated in the temperature range from 550 ℃ to 750 ℃, the highest chlorination rate was 94.02% at 700 ℃ for 90 min. The insoluble residue was determined with XRD diffractometer. The residue obtained at 700 ℃ for 90 min contained mainly a certain amount of unconverted Mg2SiO4.

关 键 词：硼铁矿 热力学 碳热氯化 氯化率 

分 类 号：TF534[冶金工程—钢铁冶金]